Holtek HT66F488 Manual page 73

HT66F488/HT66F489
A/D Flash MCU with EEPROM
Counter
Value
CCRP
CCRA
CTON
CTPAU
CTPOL
CCRA Int.
Flag CTMAF
CCRP Int.
Flag CTMPF
CTM O/P Pin
(CTOC=1)
CTM O/P Pin
(CTOC=0)
PWM Duty Cycle
set by CCRA
Note: 1. Here CTDPX = 0 - Counter cleared by CCRP
2. A counter clear sets PWM Period
3. The internal PWM function continues running even when CTIO[1:0] = 00 or 01
4. The CTCCLR bit has no influence on PWM operation
Rev. 1.21
Counter Cleared by CCRP
Pause
PWM Period
set by CCRP
PWM Mode – CTDPX = 0
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CTDPX=0;CTM[1:0]=10
Counter reset when
CTON returns high
Counter stop if
Resume CTON bit low
PWM resumes
un-defined
operation
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Time
Output Inverts
When CTPOL = 1